a behavior in which a person betrays a country or a person
The man ran away to escape from the treachery of his wife.
The spy's treachery was revealed, leading to the unraveling of a complex intelligence operation.
The historical novel depicted the political intrigue and treachery within the royal court.
Betrayed by a trusted ally, the protagonist faced the harsh consequences of treachery.
Diplomats worked tirelessly to uncover potential acts of treachery threatening international relations.
